Trisazo dye.



AUGUST BLANK, 0F LE VERKUSEN, NEAR FABBIKE'N VORM. FRIEDR. 'IION OF GERMANY.

COLOGNE. GERMANY. ASSIGNOR T0 FARBEN- BAYER (is (30., OF ELBERFELD, GERMANY, A CORPORA- TBISAZO DYE.

No Drawing.

To (1/! ir/wni Mu/1y w n/1'1" lie it knmvn'that I, AUUI tor of philosophy, chemist, (ilerman Empire, residing at near Cologne, Germany, have invented new and useful Improvements in Trisazo Dye, of which the following is a specification.

The present invention relates to the. manufacture and' n'oduction of new azo dyestutis which are obtained by combining the diam compounds prepared from amino sult'onic acids, 0. sul't'anilic acid, etc., with an amin of the benzene series having: a tree para position to the amino group, rediazotizing the aminoazo compounds thus obtained, combining the diazoazo compounds with a second molecule of the same or another of such an ainin. such as anilin. to-

m llnxxn. doccitizen of the liererluisen.

luidins, xylidin aminoplienol others, cresidin. radiazotiz'ing the anunodisazo compounds and combining the diam compounds with an azo dyestutl' component such as nitrophenylenediamin,nitrotoluyleneiliainin. One molecule of the two middle coinpodents can also be 'l-naphthylainin or its sult'onic acids. Orange to blue-red cotton dyestutl's are thus obtained; they are after dark powders soluble in water generally with a brown to being drie" and pulverized blue coloratu'm. Upon treatment with stannous chlorid and hydrochloric acid they are split up, an amino stillonic acid, a diamin and an atom are ohtained.

The new dyestutis oi the present invention have the following general formula: i i R-N:N-R -D :N-R --N :NR, where R, R and R are the aromatic nuclei or radicals, respectively of the varr soluble in water with a brown coloration and yielding upon reduction with slal'inotls acid Q-naphthyll diaminoinetliylt It dyesl o. i

Specification of Letters Patent.

Patented Feb. 4,1913.

Application filed June 1, 1911. Serial No. 630,646.

ous components used in.t'orming the dyeshifts and it the radical or nucleus of the aromatic nitro-diainin used as end compt uent.

in order to illustrate the new process more fully the following example is given, th parts being by weight: 3-H parts of the sodium salt of l-naphthylarnin-3.tS-disult'ouic acid are diazotized at about l5-20 t. with (it) parts of sodium nitrite. The diazo solution is t'(ll]ll)lllttl with a solution of LOT parts of meta-toluidin in water containing no parts oi hydrochloric acid, 130 parts of sodium acetate are slowly added. The mixture is then neutralized with sodium carbonate, caustic soda lye is added to prepare the sodium salt of the dye, 65) parts of sodium nitrite are added and then it is diaxotizi-d by adding at 1045 C. 4-50 parts of li 'drc(-hloric acid. The diazotization is complete after stirring for 3 to 4 hours and the resulting diazo compound is then again combined in the same manner with 107 parts of ineta-toluidin. The second intermediate product is then dissolved by the addition of NaUll and water. After filtration (39 parts of sodium nitrite are added and tinally at'ter cooling, to zero sutlicient hydrochloric acid to produce diazotization. The diazodisazo compound which separates is filtered ott, mixed with water and addedto an aqueous solution cooled to 0 C. of 150 parts of nitro-meta-phenylenediamin containing 150 parts of hydrochloric acid. Sodium acetate and sodium carbonate are added, the mixture is rendered alkaline and the dye is then is lated in the usual manner. It is after being dried and pulverized a dark powder having most probably the following formula:

1 The new trisazo dyestuffs of the follow ponents is of the benz ne series, and R the radical of an aromatic mtro-(liamin, which dyesiufi s to dried and pulvep izecl dark powoers solublo in Water genorally "'ii'li a brown 2.10 lilu'e coloration, and g coltoii orange to blue red shades lit, substantially as i'lescribeil.

Tho new l'llSZLZO dyestuffsof the lowing goneml forn'lulzi:

fol

where R is ullB,IX(llC2l.l of an aromatic sulfonic acid R and R the radicals of 110- L w 1 math: middle compoi'ienlis oi WlllC-ll in leasu one mush be of me lz-onzeno sexy-$, and R the radical an aromatic nitro-dimnin,

which clyostuflsmre after being dried and pulverized dark powders soluble lll 'W21L8l generally with a brown to blue coloration, M d dyeing cation orange .10 blue red shades fast to light, substantially as described.

i lo

Where the radical of a sulfonic acii of which dyestuffs after being ill'lQCl rid pulveiizeql (lax-l: powders soluble in Water generally Witl'a a brown soloi'atlon, and dyeiiig collon omiagis brow? shades fast to light, subslaiitwlly as Llescribecl,

SO H- "is after being dried a-ii'pulverizeel ClQZli' powder soluble in Water with a bI'O-x 2i 30101 anon; yielding upon reduct on with sta r nous chlorid and hydrochloric. acid 0 naphthylamin- .o-disulfonic acid, elizuninotoluene and 'ietraaminobonzene; dyeing cob ton in orange shades fast to light, substantially as desoribcln where is the radical of a sulfonic aciil of the naphthalene series, R and R aroma'tic rmlicalsof the benzene series, and R tlw 40 radical of an aromatic nitro-diamin, which. dyestuffs are aft-3 being dried and pulverized darlppowders soluble in Water generally with a brown coloration, and dyeing substantially as described.

5. The new lll'lSIlZO dyestuffs of the following formula:

6* The'herein describe-d new tertiary trineta-tolni lin as middle components, which dyes'mfi hzxvmg most; probably the formula:

1 In testimony whereof I have hereunto set 'iuv hand in the orssence of two s'ubsorlbm l l witnesses.

E AUGUST BLANK. 14. 8.] i

Witnesses ALBERT F. N'UFERU ALFRED l-lENKEL.

cotton orange brown shades fast to light, 4 5

S3550 dyestufi containing two molecules of 

